Customs officers searched the truck and discovered "a number of anomalies" during the search and their interview with Portillo Lopez. A drug-sniffing dog alerted officers to the truck's undercarriage, and a density meter also gave officers high readings "consistent with concealed contraband," officials said.

Officers eventually found 258 marijuana-filled bundles hidden in the truck's bed and cabin. The bundles weighed a total of 437 pounds, and officials estimated the street value at $350,000.